{"id":3363,"date":"2026-09-01T21:28:53","date_gmt":"2026-09-01T20:28:53","guid":{"rendered":"https:\/\/seamlessbio.de\/?p=3363"},"modified":"2026-09-01T21:28:55","modified_gmt":"2026-09-01T20:28:55","slug":"2d-bioprocessing-bags-aav-freeze-thaw","status":"publish","type":"post","link":"https:\/\/seamlessbio.de\/de\/2d-bioprocessing-bags-aav-freeze-thaw\/","title":{"rendered":"2D Bioprocessing Bags for AAV Drug Substance"},"content":{"rendered":"<p><!--\nWORDPRESS BLOG POST\nSlug: 2d-bioprocessing-bags-aav-freeze-thaw\nSEO Title: 2D Bioprocessing Bags for AAV Drug Substance \u2014 Why Freeze-Thaw Geometry Matters | SeamlessBio\nMeta Description: Why 2D flat pillow bags are the standard for AAV drug substance freeze-thaw, how geometry affects ice crystal formation, and what to look for in a bioprocessing bag for gene therapy.\nFocus Keyword: 2D bioprocessing bags AAV freeze-thaw gene therapy\nAdditional Keywords: single-use bag AAV drug substance, freeze-thaw bags gene therapy, 2D bag vs 3D bag AAV, bioprocessing bag AAV storage\nCategory: Cell Culture \u00b7 AAV & Viral Vectors\nTags: AAV, HEK293T, FBS, gene therapy, viral vector, cell culture\n--><\/p>\n<style>\n.sb-bp{font-family:-apple-system,BlinkMacSystemFont,\"Segoe UI\",Roboto,sans-serif;max-width:780px;margin:0 auto;padding:0 0 60px;color:#202020;line-height:1.75}\n.sb-bp .lede{font-size:18px;font-weight:500;color:#3a4a50;border-left:4px solid #18b7b2;padding-left:20px;margin:0 0 32px;line-height:1.65}\n.sb-bp h2{font-size:24px;font-weight:800;margin:44px 0 14px;color:#111;padding-bottom:10px;border-bottom:2px solid #e2eceb}\n.sb-bp h3{font-size:18px;font-weight:700;margin:32px 0 10px;color:#18b7b2}\n.sb-bp p{margin:0 0 18px}\n.sb-bp ul,.sb-bp ol{margin:0 0 18px;padding-left:24px}\n.sb-bp li{margin-bottom:8px}\n.sb-bp table{width:100%;border-collapse:collapse;font-size:14px;margin:20px 0 28px;display:block;overflow-x:auto}\n.sb-bp th{background:#18b7b2;color:#fff;text-align:left;padding:10px 14px;font-weight:700;white-space:nowrap}\n.sb-bp td{padding:10px 14px;border-bottom:1px solid #e2eceb;vertical-align:top}\n.sb-bp tr:last-child td{border-bottom:none}\n.sb-bp td:first-child{font-weight:600;color:#111}\n.sb-bp a{color:#18b7b2;text-decoration:none;font-weight:600}\n.sb-bp a:hover{text-decoration:underline}\n.sb-bp strong{color:#111}\n.sb-bp .box{background:#f1faf9;border-left:4px solid #18b7b2;border-radius:0 12px 12px 0;padding:20px 24px;margin:28px 0}\n.sb-bp .cta-box{background:linear-gradient(135deg,#e4f6f5,#f4fbfb);border:1px solid rgba(24,183,178,.2);border-radius:16px;padding:28px;margin-top:44px;text-align:center}\n.sb-bp .cta-box h3{color:#111;margin:0 0 10px}\n.sb-bp .cta-box p{color:#5b6b71;margin:0 0 18px;font-size:15px}\n.sb-bp .cta-btns{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}\n.sb-bp .btn{display:inline-block;background:#18b7b2;color:#fff!important;padding:10px 22px;border-radius:8px;font-weight:700;font-size:14px;text-decoration:none!important}\n.sb-bp .btn-o{display:inline-block;border:2px solid #18b7b2;color:#18b7b2!important;padding:8px 22px;border-radius:8px;font-weight:700;font-size:14px;text-decoration:none!important}\n<\/style>\n<div class=\"sb-bp\">\n<p class=\"lede\">AAV drug substance freeze-thaw is one of the most critical unit operations in gene therapy manufacturing \u2014 and one of the most underappreciated sources of product loss. The choice of container geometry for freeze-thaw has a direct impact on viral particle recovery, aggregation, and potency. This post explains why 2D flat bags are the standard for AAV drug substance and what to specify when sourcing them.<\/p>\n<h2>Why freeze-thaw is a critical operation for AAV<\/h2>\n<p>AAV drug substance (purified, formulated vector) is typically stored frozen at \u221280\u00b0C between purification and fill-finish. The freeze-thaw cycle presents three specific risks for AAV:<\/p>\n<ul>\n<li><strong>Capsid aggregation:<\/strong> ice crystal formation creates locally high protein concentrations at ice-liquid interfaces \u2014 driving aggregation of empty and full capsids. Aggregated AAV particles are immunogenic and biologically inactive, and cannot be removed without significant product loss<\/li>\n<li><strong>Genome degradation:<\/strong> if the freeze rate is too slow, prolonged exposure to concentrated solutes (cryo-concentration effect) can damage the encapsidated genome<\/li>\n<li><strong>Potency loss:<\/strong> AAV transduction efficiency is sensitive to freeze-thaw stress \u2014 poorly controlled freeze-thaw can reduce infectious titre by 2\u201310\u00d7 relative to physical titre (viral genome copies), increasing the ratio of non-infectious to infectious particles<\/li>\n<\/ul>\n<h2>How bag geometry controls ice crystal formation<\/h2>\n<p>When a liquid-filled container is cooled below the freezing point, ice nucleation begins at the coldest surface and the ice front progresses inward. The geometry of the container determines how uniform this progression is:<\/p>\n<p><strong>2D flat bag (pillow geometry):<\/strong> the thin, flat profile means that the distance from any point in the liquid to the nearest cooled surface is small and approximately equal across the entire bag. When placed between controlled-rate freezing (CRF) plates, both flat surfaces are cooled simultaneously \u2014 the ice front advances from both sides simultaneously, meeting in the middle. This produces small, uniform ice crystals with minimal cryo-concentration gradients.<\/p>\n<p><strong>3D cuboid bag or bottle:<\/strong> the thick geometry means the centre of the container is much further from the cooled wall than the corners and edges. Ice formation is highly heterogeneous \u2014 rapid at the walls, slow at the centre. This produces large ice crystals in the centre, significant cryo-concentration of proteins and excipients, and heterogeneous freeze rates across the drug substance volume.<\/p>\n<h2>Controlled-rate freezing (CRF) with 2D bags \u2014 why it works<\/h2>\n<p>Controlled-rate freezers use programmable cooling plates to apply a precise temperature ramp to the sample. For AAV drug substance, a typical CRF protocol:<\/p>\n<ol>\n<li>Cool to \u22124\u00b0C at \u22121\u00b0C\/min<\/li>\n<li>Ice nucleation step: \u221240\u00b0C at \u221225\u00b0C\/min (induces rapid, uniform nucleation)<\/li>\n<li>Cool to \u221245\u00b0C at \u22121\u00b0C\/min<\/li>\n<li>Transfer to \u221280\u00b0C storage<\/li>\n<\/ol>\n<p>This protocol only works reliably with 2D flat bags in direct contact with CRF plates. The key requirement: the bag must have consistent wall-to-wall thickness across its entire surface \u2014 so that the CRF plates make uniform contact and the cooling rate is identical across the bag. Bags with gussets, non-uniform thickness, or wrinkled film do not give reproducible results in CRF systems.<\/p>\n<h2>What to specify when sourcing 2D bags for AAV<\/h2>\n<table>\n<thead>\n<tr>\n<th>Spezifikation<\/th>\n<th>Anforderung<\/th>\n<th>Warum<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Geometrie<\/td>\n<td>Flat pillow \u2014 2D, no gussets<\/td>\n<td>Uniform CRF plate contact, consistent ice front<\/td>\n<\/tr>\n<tr>\n<td>Film material<\/td>\n<td>Multilayer PE-based \u2014 USP Class VI certified<\/td>\n<td>Biocompatibility, extractables compliance<\/td>\n<\/tr>\n<tr>\n<td>Sterilisation<\/td>\n<td>Gamma-irradiated, 25 kGy minimum \u2014 certificate included<\/td>\n<td>Sterility assurance for aseptic fill<\/td>\n<\/tr>\n<tr>\n<td>Extractables data<\/td>\n<td>Full E&#038;L data package available on request<\/td>\n<td>Required for IND\/BLA CMC section<\/td>\n<\/tr>\n<tr>\n<td>Volume range<\/td>\n<td>150 mL \u2013 50 L depending on batch size<\/td>\n<td>Match to your typical drug substance batch volume<\/td>\n<\/tr>\n<tr>\n<td>Port configuration<\/td>\n<td>Fill\/drain port (sterile connector or TC), sampling valve, vent filter<\/td>\n<td>Aseptic filling and sampling without bag opening<\/td>\n<\/tr>\n<tr>\n<td>Temperature range<\/td>\n<td>Validated for \u221280\u00b0C storage and freeze-thaw cycling<\/td>\n<td>Film must maintain integrity through freeze-thaw<\/td>\n<\/tr>\n<tr>\n<td>Integrity testing<\/td>\n<td>Per-bag integrity test \u2014 certificate of conformance<\/td>\n<td>Ensures no pin-holes or seal defects before filling<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>2D bags vs. cryovials \u2014 when to use each<\/h2>\n<p>For small-scale research AAV (typically &lt;1 mL per aliquot, for in vivo studies), cryovials are the standard. For pre-clinical GMP batches and all clinical-grade AAV drug substance, 2D bags with CRF are the standard. The transition typically occurs at batch sizes of \u226510 mL drug substance \u2014 where the non-uniformity of cryovial freeze-thaw becomes operationally impractical and scientifically unacceptable for GMP.<\/p>\n<h2>Thawing \u2014 an equally critical step<\/h2>\n<p>Controlled thawing is as important as controlled freezing. Rapid thawing in a 37\u00b0C water bath is generally preferred for AAV drug substance \u2014 slow thawing at room temperature prolongs exposure to partially-thawed, solute-concentrated regions that are particularly damaging to capsid integrity. For 2D bags, immersion in a 37\u00b0C water bath with gentle agitation thaws uniformly within 10\u201330 minutes depending on volume \u2014 much faster and more uniform than thawing 3D containers of equivalent volume.<\/p>\n<div class=\"cta-box\">\n<h3>2D Bioprocessing Bags for AAV Drug Substance \u2014 SeamlessBio<\/h3>\n<p>SeamlessBio supplies 2D flat bioprocessing bags (150 mL \u2013 50 L) \u2014 USP Class VI, gamma sterilised, integrity tested, extractables data on request. For AAV drug substance freeze-thaw and buffer storage.<\/p>\n<div class=\"cta-btns\">\n<a href=\"https:\/\/seamlessbio.de\/de\/produkte\/single-use-bioprocessing\/2d-bioprozessbeutel\/\" class=\"btn-o\">2D Bioprocessing Bags Portfolio \u2192<\/a><br \/>\n<a href=\"https:\/\/seamlessbio.de\/de\/what-is-2d-bioprocessing-bag\/\" class=\"btn-o\">What is a 2D Bioprocessing Bag? \u2192<\/a><br \/>\n<a href=\"https:\/\/seamlessbio.de\/de\/ressourcen\/blog\/2d-vs-3d-bioprocessing-bags-selection-guide\/\" class=\"btn-o\">2D vs 3D Bags \u2014 Selection Guide \u2192<\/a><br \/>\n<a href=\"https:\/\/seamlessbio.de\/de\/produkte\/single-use-bioprocessing\/\" class=\"btn-o\">Single-Use Bioprocessing Portfolio \u2192<\/a><br \/>\n<a href=\"https:\/\/seamlessbio.de\/de\/kontakt\/\" class=\"btn-o\">Request Quote \u2192<\/a>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>AAV drug substance freeze-thaw is one of the most critical unit operations in gene therapy manufacturing \u2014 and one of the most underappreciated sources of product loss. The choice of [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-3363","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>2D Bioprocessing Bags for AAV Drug Substance \u2014 Why Freeze-Thaw Geometry Matters<\/title>\n<meta name=\"description\" content=\"Why 2D flat pillow bags are the standard for AAV drug substance freeze-thaw, how geometry affects ice crystal formation, and what to look for in a bioprocessing bag for gene therapy.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/seamlessbio.de\/de\/2d-bioprocessing-bags-aav-freeze-thaw\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"2D Bioprocessing Bags for AAV Drug Substance \u2014 Why Freeze-Thaw Geometry Matters\" \/>\n<meta property=\"og:description\" content=\"Why 2D flat pillow bags are the standard for AAV drug substance freeze-thaw, how geometry affects ice crystal formation, and what to look for in a bioprocessing bag for gene therapy.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/seamlessbio.de\/de\/2d-bioprocessing-bags-aav-freeze-thaw\/\" \/>\n<meta property=\"og:site_name\" content=\"SeamlessBio\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-01T20:28:53+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-01T20:28:55+00:00\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Verfasst von\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Gesch\u00e4tzte Lesezeit\" \/>\n\t<meta name=\"twitter:data2\" content=\"4\u00a0Minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/seamlessbio.de\\\/2d-bioprocessing-bags-aav-freeze-thaw\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/seamlessbio.de\\\/2d-bioprocessing-bags-aav-freeze-thaw\\\/\"},\"author\":{\"name\":\"admin\",\"@id\":\"https:\\\/\\\/seamlessbio.de\\\/#\\\/schema\\\/person\\\/cd959a5b0b21c02c26d6ffef79f0d529\"},\"headline\":\"2D Bioprocessing Bags for AAV Drug Substance\",\"datePublished\":\"2026-09-01T20:28:53+00:00\",\"dateModified\":\"2026-09-01T20:28:55+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/seamlessbio.de\\\/2d-bioprocessing-bags-aav-freeze-thaw\\\/\"},\"wordCount\":816,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/seamlessbio.de\\\/#organization\"},\"articleSection\":[\"Uncategorized\"],\"inLanguage\":\"de\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/seamlessbio.de\\\/2d-bioprocessing-bags-aav-freeze-thaw\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/seamlessbio.de\\\/2d-bioprocessing-bags-aav-freeze-thaw\\\/\",\"url\":\"https:\\\/\\\/seamlessbio.de\\\/2d-bioprocessing-bags-aav-freeze-thaw\\\/\",\"name\":\"2D Bioprocessing Bags for AAV Drug Substance \u2014 Why Freeze-Thaw Geometry Matters\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/seamlessbio.de\\\/#website\"},\"datePublished\":\"2026-09-01T20:28:53+00:00\",\"dateModified\":\"2026-09-01T20:28:55+00:00\",\"description\":\"Why 2D flat pillow bags are the standard for AAV drug substance freeze-thaw, how geometry affects ice crystal formation, and what to look for in a bioprocessing bag for gene therapy.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/seamlessbio.de\\\/2d-bioprocessing-bags-aav-freeze-thaw\\\/#breadcrumb\"},\"inLanguage\":\"de\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/seamlessbio.de\\\/2d-bioprocessing-bags-aav-freeze-thaw\\\/\"]}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/seamlessbio.de\\\/#website\",\"url\":\"https:\\\/\\\/seamlessbio.de\\\/\",\"name\":\"SeamlessBio\",\"description\":\"Expert for biological materials for pharma, vaccines and research organizations\",\"publisher\":{\"@id\":\"https:\\\/\\\/seamlessbio.de\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/seamlessbio.de\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"de\"},{\"@type\":[\"Organization\",\"Place\",\"ProfessionalService\"],\"@id\":\"https:\\\/\\\/seamlessbio.de\\\/#organization\",\"name\":\"SeamlessBio\",\"url\":\"https:\\\/\\\/seamlessbio.de\\\/\",\"logo\":{\"@id\":\"https:\\\/\\\/seamlessbio.de\\\/2d-bioprocessing-bags-aav-freeze-thaw\\\/#local-main-organization-logo\"},\"image\":{\"@id\":\"https:\\\/\\\/seamlessbio.de\\\/2d-bioprocessing-bags-aav-freeze-thaw\\\/#local-main-organization-logo\"},\"address\":{\"@id\":\"https:\\\/\\\/seamlessbio.de\\\/2d-bioprocessing-bags-aav-freeze-thaw\\\/#local-main-place-address\"},\"telephone\":[\"+49 (851) 37932226\"],\"contactPoint\":{\"@type\":\"ContactPoint\",\"telephone\":\"+49 (851) 37932226\",\"email\":\"info@seamlessbio.de\"},\"openingHoursSpecification\":[{\"@type\":\"OpeningHoursSpecification\",\"dayOfWeek\":[\"Monday\",\"Tuesday\",\"Wednesday\",\"Thursday\",\"Friday\"],\"opens\":\"09:00\",\"closes\":\"17:00\"},{\"@type\":\"OpeningHoursSpecification\",\"dayOfWeek\":[\"Saturday\",\"Sunday\"],\"opens\":\"00:00\",\"closes\":\"00:00\"}],\"email\":\"info@seamlessbio.de\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/seamlessbio.de\\\/#\\\/schema\\\/person\\\/cd959a5b0b21c02c26d6ffef79f0d529\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"de\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/c82349c4c3fd3df1cfbb69d5f386d959a89ab4c9dcec1e7889a5140df2c0f1a0?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/c82349c4c3fd3df1cfbb69d5f386d959a89ab4c9dcec1e7889a5140df2c0f1a0?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/c82349c4c3fd3df1cfbb69d5f386d959a89ab4c9dcec1e7889a5140df2c0f1a0?s=96&d=mm&r=g\",\"caption\":\"admin\"},\"sameAs\":[\"http:\\\/\\\/seamlessbio.de\"],\"url\":\"https:\\\/\\\/seamlessbio.de\\\/de\\\/author\\\/admin\\\/\"},{\"@type\":\"PostalAddress\",\"@id\":\"https:\\\/\\\/seamlessbio.de\\\/2d-bioprocessing-bags-aav-freeze-thaw\\\/#local-main-place-address\",\"streetAddress\":\"Dr.-Ernst-Derra-Str. 4\",\"addressLocality\":\"Passau\",\"postalCode\":\"94036\",\"addressRegion\":\"Bavaria\",\"addressCountry\":\"DE\"},{\"@type\":\"ImageObject\",\"inLanguage\":\"de\",\"@id\":\"https:\\\/\\\/seamlessbio.de\\\/2d-bioprocessing-bags-aav-freeze-thaw\\\/#local-main-organization-logo\",\"url\":\"https:\\\/\\\/seamlessbio.de\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/134428046-2.png\",\"contentUrl\":\"https:\\\/\\\/seamlessbio.de\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/134428046-2.png\",\"width\":973,\"height\":288,\"caption\":\"SeamlessBio\"}]}<\/script>\n<meta name=\"geo.placename\" content=\"Passau\" \/>\n<meta name=\"geo.region\" content=\"Deutschland\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"2D Bioprocessing Bags for AAV Drug Substance \u2014 Why Freeze-Thaw Geometry Matters","description":"Why 2D flat pillow bags are the standard for AAV drug substance freeze-thaw, how geometry affects ice crystal formation, and what to look for in a bioprocessing bag for gene therapy.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/seamlessbio.de\/de\/2d-bioprocessing-bags-aav-freeze-thaw\/","og_locale":"de_DE","og_type":"article","og_title":"2D Bioprocessing Bags for AAV Drug Substance \u2014 Why Freeze-Thaw Geometry Matters","og_description":"Why 2D flat pillow bags are the standard for AAV drug substance freeze-thaw, how geometry affects ice crystal formation, and what to look for in a bioprocessing bag for gene therapy.","og_url":"https:\/\/seamlessbio.de\/de\/2d-bioprocessing-bags-aav-freeze-thaw\/","og_site_name":"SeamlessBio","article_published_time":"2026-09-01T20:28:53+00:00","article_modified_time":"2026-09-01T20:28:55+00:00","author":"admin","twitter_card":"summary_large_image","twitter_misc":{"Verfasst von":"admin","Gesch\u00e4tzte Lesezeit":"4\u00a0Minuten"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/seamlessbio.de\/2d-bioprocessing-bags-aav-freeze-thaw\/#article","isPartOf":{"@id":"https:\/\/seamlessbio.de\/2d-bioprocessing-bags-aav-freeze-thaw\/"},"author":{"name":"admin","@id":"https:\/\/seamlessbio.de\/#\/schema\/person\/cd959a5b0b21c02c26d6ffef79f0d529"},"headline":"2D Bioprocessing Bags for AAV Drug Substance","datePublished":"2026-09-01T20:28:53+00:00","dateModified":"2026-09-01T20:28:55+00:00","mainEntityOfPage":{"@id":"https:\/\/seamlessbio.de\/2d-bioprocessing-bags-aav-freeze-thaw\/"},"wordCount":816,"commentCount":0,"publisher":{"@id":"https:\/\/seamlessbio.de\/#organization"},"articleSection":["Uncategorized"],"inLanguage":"de","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/seamlessbio.de\/2d-bioprocessing-bags-aav-freeze-thaw\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/seamlessbio.de\/2d-bioprocessing-bags-aav-freeze-thaw\/","url":"https:\/\/seamlessbio.de\/2d-bioprocessing-bags-aav-freeze-thaw\/","name":"2D Bioprocessing Bags for AAV Drug Substance \u2014 Why Freeze-Thaw Geometry Matters","isPartOf":{"@id":"https:\/\/seamlessbio.de\/#website"},"datePublished":"2026-09-01T20:28:53+00:00","dateModified":"2026-09-01T20:28:55+00:00","description":"Why 2D flat pillow bags are the standard for AAV drug substance freeze-thaw, how geometry affects ice crystal formation, and what to look for in a bioprocessing bag for gene therapy.","breadcrumb":{"@id":"https:\/\/seamlessbio.de\/2d-bioprocessing-bags-aav-freeze-thaw\/#breadcrumb"},"inLanguage":"de","potentialAction":[{"@type":"ReadAction","target":["https:\/\/seamlessbio.de\/2d-bioprocessing-bags-aav-freeze-thaw\/"]}]},{"@type":"WebSite","@id":"https:\/\/seamlessbio.de\/#website","url":"https:\/\/seamlessbio.de\/","name":"SeamlessBio","description":"Experte f\u00fcr biologische Materialien f\u00fcr die Pharmaindustrie, Impfstoffe und Forschungseinrichtungen","publisher":{"@id":"https:\/\/seamlessbio.de\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/seamlessbio.de\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"de"},{"@type":["Organization","Place","ProfessionalService"],"@id":"https:\/\/seamlessbio.de\/#organization","name":"SeamlessBio","url":"https:\/\/seamlessbio.de\/","logo":{"@id":"https:\/\/seamlessbio.de\/2d-bioprocessing-bags-aav-freeze-thaw\/#local-main-organization-logo"},"image":{"@id":"https:\/\/seamlessbio.de\/2d-bioprocessing-bags-aav-freeze-thaw\/#local-main-organization-logo"},"address":{"@id":"https:\/\/seamlessbio.de\/2d-bioprocessing-bags-aav-freeze-thaw\/#local-main-place-address"},"telephone":["+49 (851) 37932226"],"contactPoint":{"@type":"ContactPoint","telephone":"+49 (851) 37932226","email":"info@seamlessbio.de"},"openingHoursSpecification":[{"@type":"OpeningHoursSpecification","dayOfWeek":["Monday","Tuesday","Wednesday","Thursday","Friday"],"opens":"09:00","closes":"17:00"},{"@type":"OpeningHoursSpecification","dayOfWeek":["Saturday","Sunday"],"opens":"00:00","closes":"00:00"}],"email":"info@seamlessbio.de"},{"@type":"Person","@id":"https:\/\/seamlessbio.de\/#\/schema\/person\/cd959a5b0b21c02c26d6ffef79f0d529","name":"admin","image":{"@type":"ImageObject","inLanguage":"de","@id":"https:\/\/secure.gravatar.com\/avatar\/c82349c4c3fd3df1cfbb69d5f386d959a89ab4c9dcec1e7889a5140df2c0f1a0?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/c82349c4c3fd3df1cfbb69d5f386d959a89ab4c9dcec1e7889a5140df2c0f1a0?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/c82349c4c3fd3df1cfbb69d5f386d959a89ab4c9dcec1e7889a5140df2c0f1a0?s=96&d=mm&r=g","caption":"admin"},"sameAs":["http:\/\/seamlessbio.de"],"url":"https:\/\/seamlessbio.de\/de\/author\/admin\/"},{"@type":"PostalAddress","@id":"https:\/\/seamlessbio.de\/2d-bioprocessing-bags-aav-freeze-thaw\/#local-main-place-address","streetAddress":"Dr.-Ernst-Derra-Str. 4","addressLocality":"Passau","postalCode":"94036","addressRegion":"Bavaria","addressCountry":"DE"},{"@type":"ImageObject","inLanguage":"de","@id":"https:\/\/seamlessbio.de\/2d-bioprocessing-bags-aav-freeze-thaw\/#local-main-organization-logo","url":"https:\/\/seamlessbio.de\/wp-content\/uploads\/2026\/04\/134428046-2.png","contentUrl":"https:\/\/seamlessbio.de\/wp-content\/uploads\/2026\/04\/134428046-2.png","width":973,"height":288,"caption":"SeamlessBio"}]},"geo.placename":"Passau","geo.region":"Deutschland"},"_links":{"self":[{"href":"https:\/\/seamlessbio.de\/de\/wp-json\/wp\/v2\/posts\/3363","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/seamlessbio.de\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/seamlessbio.de\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/seamlessbio.de\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/seamlessbio.de\/de\/wp-json\/wp\/v2\/comments?post=3363"}],"version-history":[{"count":1,"href":"https:\/\/seamlessbio.de\/de\/wp-json\/wp\/v2\/posts\/3363\/revisions"}],"predecessor-version":[{"id":3364,"href":"https:\/\/seamlessbio.de\/de\/wp-json\/wp\/v2\/posts\/3363\/revisions\/3364"}],"wp:attachment":[{"href":"https:\/\/seamlessbio.de\/de\/wp-json\/wp\/v2\/media?parent=3363"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/seamlessbio.de\/de\/wp-json\/wp\/v2\/categories?post=3363"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/seamlessbio.de\/de\/wp-json\/wp\/v2\/tags?post=3363"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}